CN114753918A

CN114753918A - Thermostat assembly and automobile

Info

Publication number: CN114753918A
Application number: CN202210296602.0A
Authority: CN
Inventors: 郭大庆; 姚建明; 陆树一; 雷芝; 朱嘉懿
Original assignee: SAIC Motor Corp Ltd
Current assignee: SAIC Motor Corp Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-15
Anticipated expiration: 2042-03-24
Also published as: CN114753918B

Abstract

The invention discloses a thermostat assembly and an automobile, wherein the thermostat assembly comprises a shell and a thermostat, the shell is provided with a first liquid inlet, a second liquid inlet and a liquid outlet, and is internally provided with a first valve port and a second valve port, the thermostat is provided with a main valve and an auxiliary valve which are oppositely arranged, in a first state, the main valve closes the first valve port, the auxiliary valve conducts the second valve port, the second liquid inlet is communicated with the liquid outlet, in a second state, the main valve conducts the first valve port, the auxiliary valve closes the second valve port, the first liquid inlet is communicated with the liquid outlet, the auxiliary valve is provided with a flow regulating hole, and in the second state, the flow regulating hole is communicated with the first liquid inlet and the second liquid inlet. This thermostat assembly has realized that a thermostat possesses the function of controlling two water route discharge, can realize improving the quick response that the thermostat adjusted the engine coolant liquid through adjusting two way discharge.

Description

Thermostat assembly and automobile

Technical Field

The invention relates to the technical field of thermostats, in particular to a thermostat assembly with a bidirectional control function. The invention also relates to an automobile provided with the thermostat assembly.

Background

The thermostat is also called thermostat and thermostat, is a valve for controlling the flow path of cooling liquid, and is an automatic temperature regulating device. Typically, temperature sensing elements are included to turn on and off the flow of air, gas or liquid by expansion or contraction.

The thermostat automatically adjusts the water quantity entering the radiator according to the temperature of the cooling water, changes the circulation range of the water, so as to adjust the heat dissipation capacity of the cooling system and ensure that the engine works in a proper temperature range. The thermostat must maintain good state of technology or otherwise seriously affect the normal operation of the engine. If the main valve of the thermostat is opened too late, the engine is overheated; if the main valve is opened too early, the preheating time of the engine is prolonged, and the temperature of the engine is too low.

At present, a thermostat which is widely used is a wax thermostat, when the cooling temperature is lower than a specified value, refined paraffin in a temperature sensing body of the thermostat is in a solid state, a thermostat valve closes a channel between an engine and a radiator under the action of a spring, and cooling liquid returns to the engine through a water pump to perform small circulation in the engine. When the temperature of the cooling liquid reaches a specified value, the paraffin begins to melt and gradually becomes liquid, the volume is increased along with the melting of the paraffin, and the rubber tube is pressed to shrink. When the rubber tube contracts, the rubber tube acts on the push rod with upward thrust, and the push rod pushes the valve downwards to open the valve. At this time, the cooling liquid flows back to the engine through the radiator and the thermostat valve and then through the water pump to perform large circulation.

Such a thermostat is generally provided with a main valve for controlling the on-off of a large cycle and an auxiliary valve for controlling the on-off of a small cycle, wherein the main valve is opened and the auxiliary valve is closed in a small cycle state, and the main valve is closed and the auxiliary valve is opened in a large cycle state. However, it has only a function of switching between a large cycle and a small cycle, and does not have a function of changing a flow rate, and it has only one coolant outlet, and in actual use, it is often necessary to further install a three-way joint or a valve for splitting flow at the coolant outlet, and it is not possible to meet design requirements of various cooling systems.

Disclosure of Invention

The present invention is directed to a thermostat assembly to solve the above-mentioned problems.

Another object of the present invention is to provide a vehicle provided with the thermostat assembly.

In order to achieve the above object, the present invention provides a thermostat assembly, including a housing and a thermostat disposed inside the housing, wherein the housing has a first liquid inlet, a second liquid inlet and a liquid outlet, and a first valve port corresponding to the first liquid inlet and a second valve port corresponding to the second liquid inlet are disposed inside the housing, the thermostat has a main valve and an auxiliary valve disposed opposite to each other, the main valve is used for opening or closing the first valve port, the auxiliary valve is used for opening or closing the second valve port, in a first state, the main valve closes the first valve port, the auxiliary valve opens the second valve port, the second liquid inlet is communicated with the liquid outlet, in a second state, the main valve opens the first valve port, the auxiliary valve closes the second valve port, the first liquid inlet is communicated with the liquid outlet, and the auxiliary valve is provided with a normally open flow rate adjusting hole, in a second state, the flow regulating hole is communicated with the first liquid inlet and the second liquid inlet, so that the second liquid inlet is changed into a liquid outlet.

Optionally, the casing is equipped with first liquid outlet and second liquid outlet, under the first state, the second inlet simultaneously with first liquid outlet and second liquid outlet intercommunication, under the second state, first inlet simultaneously with first liquid outlet and second liquid outlet intercommunication, just the second inlet is changed into the third liquid outlet.

Optionally, an inner cavity for accommodating the thermostat is formed between the first valve port and the second valve port, and the first liquid outlet and the second liquid outlet are located on a side wall of the inner cavity.

Optionally, the second liquid inlet, the first liquid outlet and the second liquid outlet are located at different heights on the side wall of the housing and are distributed along the circumferential direction in a staggered manner.

Optionally, the second inlet, the first liquid outlet and the second liquid outlet are respectively provided with a connecting pipe extending outwards, the connecting pipes of the second inlet and the first liquid outlet are straight pipes, and the connecting pipes of the second liquid outlet are bent pipes.

Optionally, the aperture of the first liquid outlet is equal to the aperture of the second liquid outlet, and the apertures of the first liquid outlet and the second liquid outlet are smaller than the aperture of the second liquid inlet.

Optionally, the first liquid inlet is a through port with a downward opening, and the second liquid inlet is a lateral port facing one side.

Optionally, the flow regulating orifice is in an eccentric position on the secondary valve.

Optionally, the aperture of the flow regulating hole is between 3mm and 5mm or between 4mm and 7 mm.

In order to achieve the other purpose, the invention provides an automobile, which comprises a power device, a chassis, a vehicle body and tires, wherein the power device is provided with a cooling system, and the cooling system is provided with the thermostat assembly.

The thermostat assembly provided by the invention realizes that one thermostat has the function of controlling the water flow of two water paths through special flow channels and structural design, can automatically change the circulation mode of cooling liquid according to the temperature of the cooling liquid, quickly adjust the water flow distribution so as to adjust the heat dissipation capacity of a cooling system, ensure that an engine works within a proper temperature range, and can improve the quick response of the thermostat to adjust the cooling liquid of the engine by adjusting the water flow of two paths.

According to the automobile provided by the invention, the cooling system is provided with the thermostat assembly, and the thermostat assembly has the technical effects, so that the automobile provided with the cooling system also has corresponding technical effects.

Drawings

FIG. 1 is a schematic structural diagram of a thermostat assembly in a first state according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a thermostat assembly in a second state according to an embodiment of the present invention.

In the figure:

1. casing 11, first inlet 12, second inlet 13, first outlet 14, second outlet 15, first port 16, second port 2, thermostat 21, main valve 22, auxiliary valve 221 and flow regulating hole

Detailed Description

In order that those skilled in the art will better understand the disclosure, reference will now be made in detail to the embodiments of the disclosure as illustrated in the accompanying drawings.

In this specification, terms such as "upper, lower, left, right" and the like are established based on positional relationships shown in the drawings, and depending on the drawings, the corresponding positional relationships may vary, and the direction defined by the characters is preferentially adopted in the direction defined by the characters in the specification, and therefore, the scope of protection is not absolutely limited; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

As shown in fig. 1 and fig. 2, in a specific embodiment, the thermostat assembly provided by the present invention mainly comprises a cylindrical housing 1 and a thermostat 2 disposed inside the housing, wherein the housing 1 is provided with a first liquid inlet 11, a second liquid inlet 12 and two liquid outlets, which are a first liquid outlet 13 and a second liquid outlet 14 respectively.

The first liquid inlet 11 is located at the lower end of the housing 1 and is a straight port with a downward opening, and the second liquid inlet 12 is located at the left side of the upper end of the housing 1 and is a lateral port towards the left side.

The second liquid inlet 12, the first liquid outlet 13 and the second liquid outlet 14 are located at different heights on the side wall of the housing 1 and are distributed in a staggered manner along the circumferential direction, wherein the caliber of the first liquid outlet 13 is substantially equal to that of the second liquid outlet 14, and the calibers of the first liquid outlet and the second liquid outlet are smaller than that of the second liquid inlet 12.

The second inlet 12 is provided with a connecting pipe extending to the left, the first outlet 13 is provided with a connecting pipe extending to the right and back, and the second outlet 14 is provided with a connecting pipe extending to the right and then bending to the back and up, that is, the connecting pipe of the second inlet 12 and the first outlet 13 is a straight pipe, and the connecting pipe of the second outlet 14 is a bending pipe, so as to adjust the flow path direction of the cooling liquid more flexibly.

The housing 1 is provided with a first valve port 15 and a second valve port 16 inside, wherein the first valve port 15 corresponds to the first inlet 11, the second valve port 16 corresponds to the second inlet 12, an inner cavity for accommodating the thermostat 2 is formed between the first valve port 15 and the second valve port 16, and the first outlet 13 and the second outlet 14 are located on the side wall of the inner cavity.

The thermostat 2 has a main valve 21 and an auxiliary valve 22 disposed opposite to each other, the main valve 21 being supported by a cylindrical spring for opening or closing the first port 15, and the auxiliary valve 22 being supported by a conical spring having a large upper portion and a small lower portion for opening or closing the second port 16.

The thermostat assembly has two operating states, in a first state, the main valve 21 closes the first port 15, at which time, the sub-valve 22 conducts the second valve port 16, the second inlet 12 is communicated with the first outlet 13 and the second outlet 14, in the second state, the main valve 21 conducts the first valve port 15, at this time, the auxiliary valve 22 closes the second valve port 16, the first liquid inlet 11 is communicated with the first liquid outlet 13 and the second liquid outlet 14, and the auxiliary valve 22 is provided with a normally open flow regulating hole 221, in the second state, the flow regulating hole 221 connects the first liquid inlet 11 with the second liquid inlet 12, after the cooling liquid enters the inner cavity of the shell 1 from the first liquid inlet 11, in addition to flowing out from the first liquid outlet 13 and the second liquid outlet 14, it flows out from the second liquid inlet 12 through the flow rate adjusting hole 221, thereby changing the second liquid inlet 12 into a third liquid outlet.

Specifically, the flow regulating holes 221 are formed at eccentric positions of the sub-valve 22, the number of the flow regulating holes can be one or two or more, and the hole diameter can be controlled to be between 3mm and 5mm or between 4mm and 7 mm.

After the thermostat assembly is installed in a cooling system, when the temperature of the coolant is lower than T, the valve core of the thermostat 2 is in an initial state, the main valve 21 closes the first valve port 15, the auxiliary valve 22 is separated from the second valve port 16, the engine coolant flows in from the second inlet 12, enters the housing 1 through the second valve port 16, and then flows to the connected cooling part from the first liquid outlet 13 and the second liquid outlet 14 respectively.

When the temperature of the coolant is higher than T, after the valve core of the thermostat 2 is heated, paraffin in the valve core begins to melt and gradually becomes liquid, the volume of the paraffin is increased accordingly, the rubber pipe is pressed to contract the paraffin, the rubber pipe contracts and simultaneously acts on the push rod to push the push rod upwards, the push rod upwards pushes the main valve 21 to move the main valve 21 upwards, the main valve 21 is separated from the first valve port 15, the auxiliary valve 22 and the main valve 21 are oppositely arranged, when the main valve 21 moves upwards, the auxiliary valve 22 also moves upwards accordingly to close the second valve port 16, and the engine coolant flows in from the first liquid inlet 11, enters the shell 1 through the first valve port 15, and then flows to the connected cooling part from the first liquid outlet 13 and the second liquid outlet 14 respectively.

Since the sub-valve 22 is designed with the normally open flow adjusting hole 221, the flow of the cooling liquid of the third liquid outlet (i.e. the second liquid inlet 12) can be adjusted by changing the size of the small flow adjusting hole 221, and accordingly, the flow of the cooling liquid of the first liquid outlet 13 and the second liquid outlet 14 is also adjusted.

This kind of structure is with original single control flap, only control the switching in a water route, through adding a vice valve 22 in opposite directions, realize controlling the switching in another water route, and through the size of the flow control hole 221 on adjusting vice valve 22, can adjust the discharge size in this water route, reached the discharge of a thermostat 2 control and two water routes of regulation, that is to say, through changing original thermostat internal valve and runner design, realized controlling the function integration of two water routes switching and flow control, can be better the demand that satisfies the diversified design of cooling system.

Moreover, the thermostat assembly is simple in structure, the installation mode of the thermostat is completely the same as that of a common single control valve thermostat, a large space does not need to be occupied, the thermostat assembly can be realized only by changing the structure of an internal valve and a shell, the number of changed parts is small, and the thermostat assembly is convenient to implement on different engines quickly.

In addition, each interface on the thermostat assembly can not only be kept unchanged, but also the quick response of the thermostat to adjust the engine coolant can be improved by adjusting the water flow of two paths.

The above embodiments are merely preferred embodiments of the present invention, and are not limited thereto, and on the basis of the above embodiments, various embodiments can be obtained by performing targeted adjustment according to actual needs. For example, a different type of thermostat 2 may be used, or the valve of the thermostat 2 may be designed in another shape, or a fourth outlet may be added to the housing 1, and so on. This is not illustrated here because of the many possible implementations.

In addition to the thermostat assembly, the present invention also provides an automobile having a power device, a chassis, a body and tires, wherein the power device is provided with a cooling system, and the cooling system is provided with the thermostat assembly described above.

During actual assembly, the thermostat assembly can be mounted on an engine body through a flange, the assembly mode is completely the same as that of a common thermostat, the thermostat assembly has the function of controlling two water paths, and the requirements of quickly adjusting water flow distribution and controlling the temperature of an engine can be met.

The thermostat assembly and the automobile provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A thermostat assembly comprises a shell (1) and a thermostat (2) arranged in the shell, wherein the shell (1) is provided with a first liquid inlet (11), a second liquid inlet (12) and a liquid outlet, and is internally provided with a first valve port (15) corresponding to the first liquid inlet (11) and a second valve port (16) corresponding to the second liquid inlet (12), the thermostat (2) is provided with a main valve (21) and an auxiliary valve (22) which are oppositely arranged, the main valve (21) is used for conducting or closing the first valve port (15), the auxiliary valve (22) is used for conducting or closing the second valve port (16), in a first state, the main valve (21) closes the first valve port (15), the auxiliary valve (22) is used for conducting the second valve port (16), and the second liquid inlet (12) is communicated with the liquid outlet, in a second state, the main valve (21) conducts the first valve port (15), the auxiliary valve (22) closes the second valve port (16), and the first liquid inlet (11) is communicated with the liquid outlet, wherein the auxiliary valve (22) is provided with a normally open flow regulating hole (221), and in the second state, the flow regulating hole (221) is communicated with the first liquid inlet (11) and the second liquid inlet (12), so that the second liquid inlet (12) is converted into the liquid outlet.

2. Thermostat assembly according to claim 1, wherein the liquid outlets comprise a first liquid outlet (13) and a second liquid outlet (14), in a first state the second liquid inlet (12) communicating with the first liquid outlet (13) and the second liquid outlet (14) simultaneously, in a second state the first liquid inlet (11) communicating with the first liquid outlet (13) and the second liquid outlet (14) simultaneously, and the second liquid inlet (12) changing into a third liquid outlet.

3. The thermostat assembly according to claim 2, characterized in that the first valve port (15) and the second valve port (16) form an inner cavity between them for accommodating the thermostat (2), the first liquid outlet (13) and the second liquid outlet (14) being located on a side wall of the inner cavity.

4. Thermostat assembly according to claim 3, characterized in that the second inlet opening (12), the first outlet opening (13) and the second outlet opening (14) are located at different heights on the side wall of the housing (1) and are distributed offset from each other in the circumferential direction.

5. The thermostat assembly according to claim 4, wherein the second liquid inlet (12), the first liquid outlet (13) and the second liquid outlet (14) are provided with connecting pipes extending outwards, the connecting pipes of the second liquid inlet (12) and the first liquid outlet (13) are straight pipes, and the connecting pipes of the second liquid outlet (14) are bent pipes.

6. Thermostat assembly according to claim 5, characterized in that the first outlet opening (13) has an aperture which is equal to the aperture of the second outlet opening (14) and which is smaller than the aperture of the second inlet opening (12).

7. The thermostat assembly as claimed in one of claims 1 to 6, characterized in that the first inlet opening (11) is a downwardly opening through-port and the second inlet opening (12) is a sideways-facing lateral port.

8. The thermostat assembly of claim 1, wherein the flow regulating orifice (221) is in an eccentric position on the secondary valve (22).

9. The thermostat assembly of claim 8, wherein the flow regulating orifice (221) has a bore diameter between 3mm and 5mm or between 4mm and 7 mm.

10. A motor vehicle comprising a power unit, a chassis, a body and tires, said power unit being provided with a cooling system, characterized in that said cooling system is provided with a thermostat assembly according to any one of the preceding claims 1-9.